package com.zxy.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zxy.reggie.common.BaseContext;
import com.zxy.reggie.common.CustomException;
import com.zxy.reggie.entity.*;
import com.zxy.reggie.mapper.OrderMapper;
import com.zxy.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @author 周向阳
 * @Auther zik~
 * @Date 2022/9/13
 * @Description
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private OrderDetailService detailService;
    @Autowired
    private AddressBookService addressBookService;

    /**
     * 用户下单
     */
    @Override
    @Transactional
    public void submit(Orders orders) {

//        获取当前用户id

        Long userId = BaseContext.getCurrentId();
//        获取当前购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);

        if (shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }

        User user = userService.getById(userId);

        Long addressBookId = orders.getAddressBookId();

        AddressBook addressBook = addressBookService.getById(addressBookId);

        if (addressBook == null){
            throw new CustomException("用户地址有误,不能下单");
        }
//        补充数据
        long orderId = IdWorker.getId();
//        订单总金额
        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetailList= shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());

            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表设置属性
        orders.setId(orderId);
        orders.setNumber(String.valueOf(orderId));
        orders.setStatus(2);
        orders.setUserId(userId);
        orders.setAddressBookId(addressBookId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setPhone(addressBook.getPhone());
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(
                (addressBook.getProvinceName() == null ? "":addressBook.getProvinceName())+
                        (addressBook.getCityName() == null ? "":addressBook.getCityName())+
                        (addressBook.getDistrictName() == null ? "":addressBook.getDistrictName())+
                        (addressBook.getDetail() == null ? "":addressBook.getDetail())
        );

//        向订单表插入数据 ，一条数据
        this.save(orders);
//        向明细表插入数据
        detailService.saveBatch(orderDetailList);
//        清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
